$ git clone -n https://src.fedoraproject.org/rpms/rpmspectool.git /var/lib/mock/f40-build-2224041-52766/root/chroot_tmpdir/scmroot/rpmspectool
Cloning into '/var/lib/mock/f40-build-2224041-52766/root/chroot_tmpdir/scmroot/rpmspectool'...
$ git fetch origin f2ddaba957f55658d70baa9a89e4bae630a48cef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpmspectool
 * [new ref]         f2ddaba957f55658d70baa9a89e4bae630a48cef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2ddaba Update to 1.99.10